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Finding the Fourth Proportional to 66,491.58, 91,745.85 and 39,636.59

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Solution

The fourth proportional to 66,491.58, 91,745.85 and 39,636.59 is: 54,691.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.58 : 91,745.85 = 39,636.59 : x
  2. Step 2: Convert to fraction form
    66,491.58/91,745.85 = 39,636.59/x
  3. Step 3: Cross multiply
    66,491.58x = 91,745.85 × 39,636.59
  4. Step 4: Simplify right side
    66,491.58x = 3,636,492,181.92
  5. Step 5: Solve for x
    x = 3,636,492,181.92/66,491.58
  6. Step 6: Final answer
    x = 54,691.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.